Crusher-mantle.



GEORGE E. DE WEIN, OF MILWAUKEE, WISCONSIN, A$SIGNOR'TO'ALLIS-CHALMERS- MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

CRUSHERPMANTLE.

Specification of Letters Patent. Patented Sept 21 1915 Application filed December 24, 1913. Serial No. 808,908.

. To all whom it may concern:

Be it known that I, GEORGE R De WEIN, a citizen of the United States, residing at Milwaukee, in the county ofMilwaukee and State of Visconsin, have invented a certain new and useful Improvement in Crusher- Mantles, of which the following is a specification.

This invention relates to improvements in the construction of sectional crusher mantles, and more specifically to means for automatically tightening or looking the mantle sections to their supporting elements.

An object of the invention is to providesimple and efficientmeans for automatically and simultaneously looking a plurality ofassociated mantle sections to each other and to their supporting elements.

'7 mantle comprising only two sections,- it"- The invention herein disclosedis an improvement in the device disclosed in Patent No. 1,066,277, dated July 1, 1913,-and consists essentially in providing T-shapedinterlocking extensions and projections at the adjacent ends of the mantle sections for automatically producing 'a locking pull upon each section at more than one portion thereof, and for preventing axial separation of the sections during the locking movement of one of the sections upon its supporting element. In the patented device, the locking projections on each of the sections are diametrically. oppositely disposed and extend in the same direction relative to a diameter,

so that upon relative rotation of the sections The present invention furthermore involves a simple formation of the ends of the sections whereby the cost of construction of these sections is reduced to a minimum. l/Vhile the present disclosure shows a crusher should be understood that the invention is generally applicable to devices in which any number" of'sections are used. A

A clear conception of an'embodim'ent of the invention may be had by referring to the drawing *accompanying'and forming a part of this specification in which like reference characters designate the same or similar parts in the various views.

Figure 1 is a front viewof a gyratory crusherhead provided with a sectional mantle and showing a'fragment of the supporting shaft. Fig. 2 is a transverse vertical sectionthrough a gyratory crusher head provided with a'sectional mantle and showing a fragment of the supporting shaft, the section being taken along the line IIIIof Fig. 3 looking in the direction'of the arrows: Fig. 3 is ab'ottom view of the gymtory' crusher head and shaft.

The 'gyratory crusher head consists of a center piece or core 2 having a central tapered bore which fits over a correspondingly tapered portion of the main crusher shaft'l. The 'core2 is fixed to the shaftl by means of'keys 3-which are fitted'into keyways 4 formed in the-tapered portion of theshaft 1. The core 2 is forced down upon the tapered portion of the shaft 1 by means of a jam nut'7" which coact'swith screw-threads 5 formed on the sh'aftl, and with the upper portion-of the core 2. The jam nut 7 is locked" into place by means of a lock nut 6 coacting therewith and also coacting with screw-threads '5 formed on the shaft 1.

The outer surface of the core 2 is formed tapered or' conical in shape and is provided with mantle sections, 8, 9, having central conical bores which fit the taper of the'outer surface" of"the'*core"2. The lower mantle cal surfaces 12 provide a suitable locking The . corresponding extensions and recesses will device for the lower mantle section 9 forrelative rotation of the section 9 upon the core 2 in either direction, this device being substantially analogous to that disclosed in Patent No.848,7 82, dated Apr. 2, 1907.

The upper extremity of the lower section 9 is provided with diametrically opposite upwardly projecting T-shaped extensions having locking projections 14:, 15, 16,17, extending laterally therefrom. The pairs of projections 14, 17 and 15, 16 are diametrically opposite and extend in opposite directions relative to their common diameters. The major portion of the upper end surface 13 of the lower section 9 is formed as a plane surface 18 which is preferably made perpendicular to the common axis of the mantle sections and of the crushing head.

The lower end of the uppermantle section 8 is provided with diametrically oppo:

site upwardly extending T-shaped recesses each having a pair of lateral lockingrproj ections 18, 19, 20, 21, extending toward each other and partially spanning the recesses. With the mantle assembled, the upper T- shaped extensions of the lower section 9 are disposed within the correspondingly shaped recesses in the lower portion of the upper section 8, while the upper plane surface'l3 of the major portion of the lower section 9 coacts with a similarly disposed plane surface 13 at the lower end of the upper section 8.

In order'to assemble the mantle, the extensions formed on the lower section 9 'must first be brought into alinement with the similarly formed recesses on the upper section 8, the axes of the sections being parallel to each other and the sections 8, 9, being staggered, after which relative lateral shifting of the sections 8, 9, will bring them into a position where their axes as well as their coincide. In order to permit ready assembling of the parts in this manner, the recesses in the'section 8 are formed slightly larger than the corresponding extensions on section 9, and the sides of the recesses and extensions are formed with parallel straight line elements. I V v With the crushing head assembled and duringnormal operation of the same, relative rotation of the lower section 9 upon the core 2 will cause the lugs 10 to ride along the surfaces 12 and to thereby firmly lock the lower mantle section upon the tapered outer surface of the core v2 by pulling the mantle section 9 downwardly. This relative rotation and downward movement of the section 9 upon the core 2 will be transmitted through the extensions at the upper end thereof to the upper section 8. If the relative rotation of the section 9 upon the core 2 is in a clockwise direction, looking downwardly upon the head, the diametriof the section 8. If the relative rotation of the section 9 upon the core 2 is in an anticlockwisedirection, the projections 15, 16,

willmove toward therecesses formed above the projections 19, 20, and will again'tend to pull the upper section 8 down against the outer taper of the core 2 at points on opposite sides thereof. It is thus to be noted that irrespective of the direction of relative rotaper section 8 will simultaneously be pulled down against the taper of the core 2 by means of the projections 14, 15, 16, 17. The fact that these projections are arranged-in diametrically opposite oppositely disposed pairs, provides an efficient means for producing a simultaneous locking pull on the. section 8 on opposite'sides' thereof.

facilitates construction of the section ends.

It should be understood that it is'not desired to be limited to the exact'detailsof construction shown and described, for obvious modifications will occur to a person skilled in the art. 7

It is claimed and desired to secure by Letters Patent,

1. In a crusher, .a mantle comprising 'a plurality of sections each having diametrically opposite locking projections extending in opposite directions relative to a diame-' ter and formed to tend during operation to draw the sections together.

2."In a crusher, a mantle comprising a The formation of "the adjacent ends ofthe sections 8, 9, as plane surfaces'13 which are perpendicular to the axes of; the sections,also

plurality of sections each having diametri cally opposite locking projections extending. in opposite directions relative to a diameter,

and theprojections on adjacent sections extending inopposite directions relative to each other and formed to tend during'operation to draw the sections together.

3. In a crusher, a mantlecomprising a having a pair of diametrically opposite T shaped extensions coacting with similarly formed recesses in the adjacent section and .115 plurality of sections,"one of said sections plurality of sections, the adjacent ends of said sections being formed with diametri-- cally opposite coacting T-shaped'extensions andrecesses for preventing axial separation of said sections and formed to tend during operation to draw the sections together.

5. In a crusher, a mantle comprising a pluralityof co-axial sections having parallel 80 tion of the lower-mantle section 9, the up plane adjacent end surfaces formed perpen- In testimony whereof, the signature of dicular to the axis of said sections, the adjathe inventor is aflixed hereto in the presence cent ends of said sections being formed with of two witnesses.

diametrically opposite interlocking projec- G. F. DE WEIN. 5 tions for preventing axial separation of the Witnesses:

sections and formed to tend during opera- W. H. LIEBER,

tion to draw the sections together. H. W. CHENEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

